My current CYA reading is 60-70. I've started using bleach to chlorinate, but I am also still using tablets at a reduced level. Not yet ready to commit to full manual mode at this time.
Here are my questions...
Part 1: It looks like manually adding bleach, plus general health issues because of lower chlorine levels, may be a little more reasonable with CYA levels at 30-40 instead of 60-70. Is it worth the effort to reduce CYA to reduce amount of chlorine needed?
Part 2: To reduce CYA, would draining 10% of the pool 5 times have the same effect on CYA as draining 50% of the pool 1 time? (or whatever numbers you would like to use).
Part 3: I understand CYA rises to the top of the pool. Is it always there, even while the pool is circulating, polaris running, etc, or does it get mixed throughout when the pool is running. If it does mix as the pool runs, how soon after you shut it off does the CYA rise to the top? I'm asking because I've been told to reduce CYA you are best to drain from the top. I've done this by connecting my vacuum hose to the skimmer, and shutting off the main drain and the other skimmer, and vacuuming to waste? It is much slower because everything has to come through that one little hose.
Thanks for your feedback.